4. Incoherent or inelegant; poorly chosen; not well organized.
“The program has a random set of misfeatures.” “That's a
random name for that function.” “Well, all the names were
chosen pretty randomly.”

5. In no particular order, though deterministic. “The I/O
channels are in a pool, and when a file is opened one is chosen
randomly.”

6. Arbitrary. “It generates a random name for the scratch
file.”

7. Gratuitously wrong, i.e., poorly done and for no good apparent
reason. For example, a program that handles file name defaulting in a
particularly useless way, or an assembler routine that could easily have
been coded using only three registers, but redundantly uses seven for
values with non-overlapping lifetimes, so that no one else can invoke it
without first saving four extra registers. What
randomness!

8. n. A random hacker; used
particularly of high-school students who soak up computer time and
generally get in the way.

9. n. Anyone who is not a hacker
(or, sometimes, anyone not known to the hacker speaking); the noun form of
sense 2. “I went to the talk, but the audience was full of randoms
asking bogus questions”.

11. [UK] Conversationally, a non sequitur or something similarly
out-of-the-blue. As in: “Stop being so random!” This sense
equates to ‘hatstand’, taken from the Viz comic character
“Roger Irrelevant - He's completely Hatstand.”